Japan · JIS
SSW-Q3R Class 2
JIS E5402-1:2005 — JIS E5402-1
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.57 | 0.8 | Ladle analysis: 0.60-0.75% | Ladle analysis: 0.60-0.75% |
| Cr | 0.28 | Ladle analysis: max 0.30% | Ladle analysis: max 0.30% | |
| Cu | 0.28 | Ladle analysis: max 0.30% | Ladle analysis: max 0.30% | |
| Mn | 0.46 | 0.94 | Ladle analysis: 0.50-0.90% | Ladle analysis: 0.50-0.90% |
| Mo | 0.08 | for both analysis | for both analysis | |
| Ni | 0.28 | Ladle analysis: max 0.30% | Ladle analysis: max 0.30% | |
| P | 0.055 | Ladle analysis: max 0.045% | Ladle analysis: max 0.045% | |
| S | 0.06 | Ladle analysis: max 0.050% | Ladle analysis: max 0.050% | |
| Si | 0.13 | 0.38 | Ladle analysis: 0.15-0.35% | Ladle analysis: 0.15-0.35% |
| V | 0.05 | for both analysis | for both analysis |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| quenched and tempered | ≥770 | 8–12 | HB 311–363 HB(rim) |